Re: [PATCH v1] ASoC: ops: Fix integer detection for when max possible values > 1

[Charles Keepax <ckeepax@opensource.cirrus.com>]

On Fri, Jun 17, 2022 at 04:36:06PM +0100, Stefan Binding wrote:
> The standard snd_soc_info_volsw() allows a two value control to be
> defined as an integer control only if the control name ends in
> "Volume". It achieves this by creating a substring if it contains
> " Volume", and ensuring this exists at the end of the name. The
> volume substring is then used to decide whether the type is a
> SNDRV_CTL_ELEM_TYPE_INTEGER or SNDRV_CTL_ELEM_TYPE_BOOLEAN.
> However this volume substring is only computed for a two value
> control.
> This means for controls where there are more than two possible
> values, the substring is never created, so in this case the
> substring remains NULL, and the condition yields
> SNDRV_CTL_ELEM_TYPE_BOOLEAN, even though there are more than 2
> possible values.
> If there are more than 2 possible values for the control,
> then it should always be an integer control.
> 
> Fixes: aa2a4b897132 ("ASoC: ops: Fix boolean/integer detection for simple controls")
> 
> Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
> ---

Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles